Novel phase change materials with tunable transition properties

具有可调转变特性的新型相变材料

• 批准号: 1809520
• 负责人: Haiyan Wang
• 金额: $ 41.75万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1809520&HistoricalAwards=false
• 关键词: Novel; phase; change; materials; tunable

Non-technical Description: Oxide-based phase change materials represent an interesting family of materials with ability to dramatically change their physical properties during phase transition processes. Vanadium dioxide (VO2), as one of the representatives, is of particular interest because of its phase transition could occur close to room temperature. The project seeks to tune the phase transition properties (e.g., phase transition temperature) through a novel two-phase nanocomposite design approach. By combining VO2 with a metal as a secondary metal phase in the nanocomposite thin films, the phase transition properties are tuned in a wide range. Such tunable transition properties are critical for various applications, including thermal actuators, electrical switching devices and smart windows. In addition to scientific and technological impacts, this research provides training to graduate and undergraduate students in the multidisciplinary research area of phase change materials, thin film growth and materials characterizations. The research findings are disseminated through in-class teaching modules related to phase change materials, summer research for undergraduates and high school students, and various outreach activities sponsored by Purdue Women in Engineering Program and Birck Nanoday events.Technical Description: The project focuses on a fundamental material exploration of novel two -phase metal-VO2 nanocomposite designs, their phase change properties and the fundamental switching mechanisms as functions of the metal selections and the nanoparticle dimensions, density and geometries. As one of the Mott insulating oxide materials, VO2 exhibits an ultrafast and reversible phase transition from a semiconductor phase to a metallic phase at about 68 ?C during heating process. To enable its practical applications, tunable transition properties (e.g., phase transition temperature tuning over a broad temperature range) are very much desired. Specifically, the project focuses on synthesizing the two-phase metal-VO2 nanocomposites in an epitaxial thin film form, tuning the transition temperature and phase transition properties via selection of metals, as well as understanding the fundamental phase transition mechanisms via tailoring the two-phase morphology, e.g., the metal phase geometry, density, dimension, etc. The phase change properties are measured by a set of electrical transport and optical measurements, coupled with a detailed microstructural characterization, including high resolution transmission electron microscopy, atomic scale elemental mapping and strain mapping. The two-phase nanocomposite design and the fundamental understanding on the phase transition mechanisms can be applied to other Mott insulating oxide systems for tunable phase change properties beyond VO2.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术描述：氧化物相变材料代表了一个有趣的材料家族，能够在相变过程中显着改变其物理特性。二氧化钒（VO2）作为其中的代表之一，因其在接近室温时可以发生相变而受到特别关注。该项目试图通过一种新颖的两相纳米复合材料设计方法来调整相变特性（例如相变温度）。通过将 VO2 与金属结合作为纳米复合薄膜中的第二金属相，可以在很宽的范围内调节相变性能。这种可调的转变特性对于各种应用至关重要，包括热执行器、电气开关装置和智能窗户。除了科学和技术影响外，该研究还为研究生和本科生提供相变材料、薄膜生长和材料表征多学科研究领域的培训。研究成果通过与相变材料相关的课堂教学模块、本科生和高中生的暑期研究以及普渡大学女性工程项目和 Birck Nanoday 活动赞助的各种外展活动来传播。 技术描述：该项目重点关注新型两相金属-VO2纳米复合材料设计的基础材料探索、它们的相变特性以及作为金属选择和纳米粒子尺寸、密度和几何形状函数的基本切换机制。作为莫特绝缘氧化物材料之一，VO2在加热过程中在约68℃时表现出从半导体相到金属相的超快且可逆的相变。为了实现其实际应用，非常需要可调节的转变特性（例如，在较宽的温度范围内调节相变温度）。具体来说，该项目的重点是合成外延薄膜形式的两相金属-VO2纳米复合材料，通过选择金属来调节转变温度和相变特性，以及通过定制两相材料来了解基本相变机制。形态，例如金属相几何形状、密度、尺寸等。相变特性通过一组电传输和光学测量以及详细的微观结构表征来测量，包括高分辨率透射电子显微镜、原子级元素映射和拉紧映射。两相纳米复合材料设计和对相变机制的基本理解可应用于其他 Mott 绝缘氧化物系统，以获得超越 VO2 的可调相变特性。该奖项反映了 NSF 的法定使命，并通过使用基金会的评估进行评估，被认为值得支持。智力价值和更广泛的影响审查标准。

项目成果

Epitaxial Growth of Aurivillius Bi 3 Fe 2 Mn 2 O x Supercell Thin Films on Silicon

硅上 Aurivilius Bi 3 Fe 2 Mn 2 O x 超级电池薄膜的外延生长

• DOI: 10.1021/acs.cgd.2c01300
• 发表时间: 2023-04
• 期刊: Crystal Growth & Design
• 影响因子: 3.8
• 作者: Barnard, James P.;Paldi, Robynne L.;Kalaswad, Matias;He, Zihao;Dou, Hongyi;Zhang, Yizhi;Shen, Jianan;Zheng, Dongqi;Dilley, Neil R.;Sarma, Raktim;et al
• 通讯作者: et al

Tunable Tribovoltaic Effect via Metal–Insulator Transition

通过金属-绝缘体转变的可调谐摩擦伏特效应

• DOI: 10.1021/acs.nanolett.2c03481
• 发表时间: 2022-11
• 期刊: Nano Letters
• 影响因子: 10.8
• 作者: Yang, Ruizhe;He, Zihao;Lin, Shiquan;Dou, Wenjie;Wang, Zhong Lin;Wang, Haiyan;Liu, Jun
• 通讯作者: Liu, Jun

Face mask integrated with flexible and wearable manganite oxide respiration sensor

集成了灵活、可穿戴式氧化锰呼吸传感器的面罩

• DOI: 10.1016/j.nanoen.2023.108460
• 发表时间: 2023-07
• 期刊: Nano Energy
• 影响因子: 17.6
• 作者: Ye, Lianxu;Wu, Fan;Xu, Ruixing;Zhang, Di;Lu, Juanjuan;Wang, Chuanlong;Dong, Anjiang;Xu, Sichen;Xue, Lejun;Fan, Zixin;et al
• 通讯作者: et al

Enhancing electrochemical performance of thin film lithium ion battery via introducing tilted metal nanopillars as effective current collectors

通过引入倾斜金属纳米柱作为有效集流体增强薄膜锂离子电池的电化学性能

• DOI: 10.1016/j.nanoen.2019.104381
• 发表时间: 2020-03-01
• 期刊: Nano Energy
• 影响因子: 17.6
• 作者: Z. Qi;Jialiang Tang;S. Misra;C. Fan;P. Lu;J. Jian;Zihao He;V. Pol;Xinghang Zhang;Haiyan W
• 通讯作者: Haiyan W

Single-Step Fabrication of Au-Fe-BaTiO3 Nanocomposite Thin Films Embedded with Non-Equilibrium Au-Fe Alloyed Nanostructures

嵌入非平衡 Au-Fe 合金纳米结构的 Au-Fe-BaTiO3 纳米复合薄膜的一步制备

• DOI: 10.3390/nano12193460
• 发表时间: 2022-10-03
• 期刊: Nanomaterials
• 影响因子: 5.3
• 作者: Rutherford BX;Dou H;Zhang B;He Z;Barnard JP;Paldi RL;Wang H
• 通讯作者: Wang H